Shelly Pro Sensor Add-on
Device image(s)
Short description
Transform your Shelly Pro device into a powerful sensor hub with the Shelly Pro Sensor Add-on. This galvanically isolated interface lets you connect multiple sensor types for real-time monitoring and advanced automation in any environment - residential, commercial, or industrial.
It provides two 1-Wire interfaces, two analog inputs (0-10V), two digital inputs (±15V), and a potential-free solid-state relay output, giving you maximum flexibility to build customized, intelligent solutions.
Compatible with most Arduino sensors, the Shelly Pro Sensor Add-on opens the door to limitless applications.
Main features
Expands functionality of selected Shelly Pro devices with additional sensor connectivity.
Galvanically isolated for safe and reliable operation.
Supports multiple sensor types for advanced automation.
2× DATA (1-wire data terminals) – connect up to five DS18B20 temperature sensors, one DHT22 for temperature and humidity, or other 1-Wire devices.
2× Analog inputs (0-10V) – suitable for sensors such as CO₂, pressure, light, or other analog types.
2× Digital inputs (±15V) – for motion detectors, leak sensors, switches, and more.
1× Potential-free solid-state relay input – ideal for relays, alarms, or other external circuits.
Compatible with most Arduino sensors for custom projects.
Ideal for DIN rail installations in residential, commercial, and industrial environments.
Use cases
Monitor and Control Critical Conditions
Install the Shelly Pro Add-on in your DIN-mounted setup to track temperature, humidity, open doors/windows, or other key data directly from the electrical panel.Optimize HVAC and Energy Use
Connect temperature, humidity, and other sensors to fine-tune heating, cooling, and ventilation for maximum comfort and efficiency.Automate Lighting with Motion Detection
Use a PIR sensor to turn lights on only when a room is occupied - ideal for hallways, storage areas, or office spaces.Protect Against Leaks and Weather
Integrate water leak, rain, or wind sensors to safeguard your property and automatically react to environmental changes.Smart Irrigation and Outdoor Control
Pair with a soil moisture sensor to water only when needed, or automate awnings and blinds for weather protection and comfort.Custom Projects and Specialized Monitoring
Leverage compatibility with Arduino sensors to build unique solutions for homes, aquariums, or industrial applications.
Main applications
Residential
MDU (Multi Dwelling Units - apartments, condominiums, hotels, etc.)…
Light commercial (small office buildings, small retail/restaurant/gas station, etc.)…
Government/municipal
University/college
Farming
Integrations
Amazon Alexa supported capabilities
N/A
Google Smart Home supported traits
N/A
Samsung SmartThings supported capabilities
N/A
Device electrical interfaces
Inputs
2x Analogue inputs (0-10 V)
2x Digital inputs (±15 V)
Outputs
1x Potential-free solid-state relay output
1-wire terminals
2x DATA (independent)
Power / Reference
2x GND
1x VREF
1x VREF + R1
1x VCC
Add-on interface
Shelly proprietary serial interface to connect to a Shelly Pro device
Supported Sensors
Up to 5x DS18B20 temperature sensors per channel.
DHT22 temperature and humidity sensors.
NTC resistors with 10 kΩ nominal resistance and β=4000 K
Photoresistors
PIR sensors
Soil moisture sensors
Ultrasonic proximity sensors
Capacitive liquid level sensors
Sound detectors
Other analog sensors with 0 to 10 V output voltage
Specifications
Quantity | Value |
|---|---|
Physical | |
Size (HxWxD): | 94x19x69 / 3.70x0.75x2.71 |
Weight: | 45 g / 1.59 oz |
Mounting: | DIN Rail |
Conductor cross section: | 0.2 to 0.5 mm² / 24 to 20 AWG |
Conductor stripped length: | 5 to 8 mm / 0.20 to 0.31 in |
Shell material: | Plastic |
Shell color: | Black |
Connectors color: | Black |
Environmental | |
Ambient working temperature: | -20 °C to 40 °C / -5 °F to 105 °F |
Humidity: | 30% to 70% RH |
Max. altitude: | 2000 m / 6562 ft |
Electrical | |
Power supply: | 12 V (from compatible Shelly device) |
Power consumption: | < 0.5 W (without sensors) |
Digital input: | -15 V to 0.5 V (True) / 2.5 V to 15 V (False)* |
Analog input range: | 0 to 100% |
Analog input report threshold: | 1%** |
Voltmeter range: | 0 to 10 V |
Voltmeter report threshold: | 0.1 V** |
Analog input / Voltmeter accuracy | Better than ±5% |
Output circuits ratings | |
VCC max. current: | 10 mA |
VREF max. current: | 2 mA |
VREF+R1 resistor | 10 kΩ |
Max switching voltage: | 30 V |
Max switching current: | 300 mA |
Microcontroller unit | |
CPU: | STM32G071GBU6 |
Compatible devices: |
|
Others | |
Temperature reading accuracy: | Depends on the DS18B20 or DHT22 sensors |
Humidity reading accuracy: | Depends on the DHT22 sensor |
*Logic can be inverted in the digital input settings
** Can be configured in the analog input / voltmeter settings
Basic wiring diagrams
Legend
Terminals | |
|---|---|
GND | Ground terminals |
DATA 0/DATA1 | 1-Wire data terminals |
VCC | Sensor power supply terminals |
VREF | Reference voltage output |
VREF + R1 | Reference voltage through a pull-up resistor output for passive devices that need it to form a voltage divider. |
AIN0 / AIN1 | Analog inputs (0-10 V) |
DIN0 / DIN1 | Digital inputs (±15 V) |
IN | Potential-free solid-state relay input |
OUT | Potential-free solid-state relay output |
Compliance and certification
Shelly Pro Sensor Add-on multilingual EU declaration of conformity 289 2026-04-28.pdf
Shelly Pro Sensor Add-on UK PSTI ACT statement of compliance 289 2026-04-28.pdf
Shelly Pro Sensor Add-on UKCA declaration of conformity 289 2026-04-28.pdf
API and components
All Shelly devices and services